I’ve been having an issue where when I mask off certain parts of my model, and the proceed to paint over them, large streaking artifacts will appear over the pieces I have masked off, essentially ruining any work I had done in the area.
I noticed when you turn bleed down to 0 pixels, it no longer will streak, but you then run into the issue that your seams aren’t gonna receive any paint.
Was able to replicate this bug in my scene with the official 2.71 release.